Electric-alarm system



(No Model!) W. P. ROSSBAGH.

ELEGTRIG. ALARM SYSTEM.

Patented Nov. 20, 1888.

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UNITED STATES PATENT XVILLTAM F. ROSSBACTT, OF BtOOKLYN, NEW YORK.

ELECTRIC-ALARM SYSTEM.

SPECIFICATION forming part of Letters Patent No. 398,078, dated November 20, 1888.

Application Filed April 25, 1888. Serial No. 271,862.

To whom, it may concern:

Be it known that 1, WILLIAM F. Ross- BAOH, of Brooklyn, in the county of Kings and State of New York,have invented certain new and useful Improvements in Electric-Alarm Systems, of which the following is a specification.

The object of my invention is to provide a new and improved electric-alarm system, by means of which an alarm can be given at a number of different places at desired different times, or at the same time, a single clock only being required for the several gongs or alarm devices.

The invention consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter, and then pointed out in the claim.

In the accompanying drawings, Figure l is a diagrammatic View of my improved electricalarm system. Fig. 2 is a rear View of the switch. Fig. 3 is a vertical transverse section of part of the clock-dial,shewing the circuit-closer on the clock. Fig. 4 is a face view of the circuit-closing wheel of the clock. Fig. 5 is a face view of the rear side of the clockdial, showing the circuit-closing strips on the same.

Similar letters of reference indicate corre sponding parts.

A flat annular insulating-plate, A, is socured on the back of the elock-dial B, at the center thereof,and on the said insulating-plate twelve or more metal strips, 0, are secured radially equidistant, and each is connected with an insulated conducting-wire, D. An insulated wire, E, connected with the battery 1 has one end coiled a number of times around the arbor G, carrying the hour-hand I and the cog-wheel J for driving said arbor, which cog-wheel makes one revolution each hour.

A spring-tongue, K, projects from the wheel J sufficiently to come in contact with the several strips 0 as the wheel J rotates. The wires D are each connected with a contact-button, L, arranged on a switch-board, M, on which a switch-lever, O, is pivoted, the buttons L being arranged on a circular line around the (X0 model.)

turning point or pivot 01' said switch-lever. The pivot of the switch-lever O is connected by the wire P with an electric bell, Q, of the usual construction, and said bell is connected by the wire S with the battery F.

The operation is as follows: If the alarm is to be sounded at a certain hour, the switchlcver O is turned so that its free end will rest on that button L connected with that wire that is connected with the strip 0 on the plate A. corresponding to the numeral of the de sired hour on the dial 13. For example, if the alarm is to bcsounded at siroclock, the switch-lever O is brought in eontactwith that button L that is connected by a wire, D, with the strip 0 behind the numeral 6 on the dial. As the wheel J rotates, its contact-tongue K sweeps over the strips G and comes in contact with them successively, but does not close the circuit until it comes in contact with the strip 0 behind the numeral 6 on the dial. The circuit will then be from the battery through the wire E to the arbor G, the wheel J, the tongue K, the said strip C, the corresponding wire, D, the corresponding button, L, the lever O, the wire 1?, the bell Q, and the wire S to the battery. In the same manner the switch can be adjusted to sound the alarm at any other desired hour.

YVhenever on any one switch the lever is set for a certain hour, the circuit of the bell con neeted with the said switch will be closed at the said hour and the alarm sounded. I have shown but twelve wires ll), strips 0, and buttons L, and the device can only sound the alarm at the hours; but by providing a greater number of wires D, strips 0, and buttons L, or arranging the strips C dihfercntly, the device can be used for sounding the alarm at half or quarter hours.

Having thus described my in vention, I claim as new and desire to secure by Letters Patent- The combination, with a clock having an insulatingplate on the back of its dial, of a series of metallic strips on said plate, a wire connecting the hour-hand arbor of the clock with the battery, a wheel on said arbor, a sliding contact-strip secured to said wheel and adapted to sweep over the strips on the In testimony that I claim the foregoing as insulating-plate, a wire connected with each my invention I have signed my name in presstrip, aswitch having a number of buttons,

each of which is connected with one of the ence of two subscribing witnesses. wires connected with the strips, an electric 5 bell, a wire connecting the bell with a switch- XVitncsses:

lever, and a battery connected with the bell, PAUL GOEPEL, substantially as set forth. CARL KARP.

M. F. ROSSBAOH. 

